
EPA Mississippi EPSCoR Program
EPA Award Number
R821832-01-0 to the University of Mississippi, with subcontracts to Jackson State
University, Mississippi State University and the University of Southern Mississippi |
Award Period
October 1, 1995 - September 30, 1997 |
- Award Amount
$878,027 (EPA: $323,667; Matching:
$551,027) |
- Principal Investigator
Dr. Stephen T.
Threlkeld, Department of Biology, University of Mississippi, University, MS 38677
1996 Experimental Results
1997 Experimental Plans
Upcoming Project Activities
|
Program Description
- The purpose of this program is to stimulate and enhance the quality of academic research
in Mississippi. The primary research objective is to foster the study of singular and interactive fate
and effects of agricultural materials in wetland ecosystems.
|
Research Project Description
- The research project is focused on experimental mesocosm study
of the main and
interactive
effects of
runoff of three agricultural chemicals (atrazine, monosodium acid methane arsonate, chlorpyrifos) on
wetland ecosystems.
In our first experiment (started in June 1996) the three agrichemicals and methyl mercury were applied to
66 of the 500-liter mesocosms in a center-point enhanced 2^4 factorial design,
and multiple endpoints were monitored for the following 94 days, including 32 days after half of
the
mesocosms were redosed. The endpoints included
assays of chemical mutageneticity on bacteria and fish, biochemical responses of plants, invertebrates and
fish to the chemicals, organism survivorship, community structure and ecosystem responses (productivity),
as well as partitioning of the chemicals in water, sediment, fish and plants in the wetland mesocosms. In
May 1997, the three agrichemicals will be added to 72 of the mesocosms at ambient and reduced
levels
of UV-B radiation, to assess the interactive effects of commonly used agrichemicals and UV-B radiation.
|
Scientific Staff
Click here for
telephone, fax and e-mail directory
- University of Mississippi: Dr.William
Benson, Dr. Carol Britson, Dr. Stephen D'Surney,
Dr. Gary Gaston, Dr. Tyrus McCarty, Dr. Clifford Ochs, Dr.
Daniel Schlenk, Dr. Sumon Sinha,
Dr. Marc Slattery, Dr. Stephen Threlkeld, Mr. Jimmy Allgood, Mr. Robert Baca, Ms. Hope Belk, Mr. Bryan
Brooks, Ms. Julie
Chambers, Ms.
Carol Cleveland, Ms. Abir El-Alfy, Mr. David Felder, Ms. Karen Konzen, Mr. Bruce Libman, Mr. Ken
Overstreet, Ms. Virginia Powers, Mr. Bo Salamon, Mr. Jeffrey
Steevens, Ms. Kathryn Valentine
- Jackson State University: Dr. Huey-Min Hwang, Dr. Wen-Hsun Yang, Ms. Neisee
MacArthur
- University of Southern Mississippi: Dr. Judy Lytle, Dr. Tom Lytle
- Mississippi State University: Dr. Charles Rice, Dr. Laurie Roszell, Ms. Robyn
Arnold
|
Research Results -- 1996 Experiment
|
Research Planning -- 1997 Experiment
- Mesocosm Setup
- Expected Mode of
Action
- Experimental Design
and Statistical Analysis
- Schedule
|
Upcoming Project Activities
|
Last Modified: Monday, 17-Mar-97 09:45 CST